diff --git a/lib/libunrar.so b/lib/libunrar.so
new file mode 100755
index 0000000..8aa3c60
Binary files /dev/null and b/lib/libunrar.so differ
diff --git a/update.sh b/update.sh
index 39a997b..a08dbf5 100755
--- a/update.sh
+++ b/update.sh
@@ -46,3 +46,12 @@ do
 done
 
 rm -r p35 p36 p37 old requirements.txt
+if [ ! -e lib/libunrar.so ]; then
+    curl -sLO https://www.rarlab.com/rar/unrarsrc-5.7.1.tar.gz
+    untar xzf unrarsrc-5.7.1.tar.gz
+    cd unrar
+    make lib
+    mv libunrar.so ../lib/libunrar.so
+    cd ..
+    rm -r unrar unrarsrc-5.7.1.tar.gz
+fi